OC 0501
0.22
UTI
0.27
CN
0.18
Cdens
0.5
CC3
0.06
Clit
1.0
Cdup
Nm (P>50%)
27
Core radius and density
1.3 [pc], 0.9 [pc-2]
- CN 0.27 Poorly populated
- Cdens 0.18 Very loose
- CC3 0.5 Intermediate quality
- Clit 0.06 Rarely studied
- Cdup 1.0 Unique
đĨ Members
đ Colab
đŦ Bayestar19
MOCA
đ CDS
đ Simbad
đ CDS (Îą, δ)
đ Simbad (Îą, δ)
MOCA
đ CDS
đ Simbad
đ CDS (Îą, δ)
đ Simbad (Îą, δ)
Overview
OC 0501 is a poorly populated, very loose object of intermediate C3 quality. Its parallax locates it at a relatively close distance, near the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, young cluster, but with a large variance across recent sources for the metallicity parameter (see Parameters). It is rarely studied in the literature.
â ī¸ Warning: the low UTI value and no obvious signs of duplication (Cdup=1.0) indicate that this is quite probably an asterism, moving group, or artifact, and not a real open cluster.
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | 99999â | 137.186 | -46.439 | 0.627 | -5.302 | 1.65 | 0.238 |
| Hunt & Reffert | 2024 | 137.252 | -46.434 | 0.624 | -5.321 | 1.652 | -0.309 |
| Cavallo et al. | 2024 | 137.202 | -46.481 | 0.622 | â | â | â |
| Hunt & Reffert | 2023 | 137.252 | -46.434 | 0.624 | -5.321 | 1.652 | -0.309 |
| Hao et al. | 2022 | 137.252 | -46.433 | 0.628 | -5.308 | 1.677 | â |
đĄ Note: The UCC values are estimated from its identified members.
| Reference | Year | Dist [kpc] | Av [mag] | DAv [mag] | Age [Myr] | [Fe/H] [dex] | Mass [Msun] | Bfrac | BSS |
|---|---|---|---|---|---|---|---|---|---|
| UCC | 99999â | 1.52 | 2.23 | 1.5 | 46 | 0.206 | 177 | â | â |
| Hunt & Reffert | 2024 | 1.52 | 2.23 | 1.50 | 51 | â | 177(1) | â | â |
| Cavallo et al. | 2024 | 1.72 | 2.28 | â | 41 | 0.390 | â | â | â |
| Hunt & Reffert | 2023 | 1.52 | 2.23 | 1.50 | 51 | â | â | â | â |
| Hao et al. | 2022 | â | 2.10 | â | 25 | 0.022 | â | â | â |
(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.
Palma et al. (2025)
Classified as optical pair P462, along with HSC_2185.
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.83 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.83 (50th percentile).